Solidification of Carbonic Acid. 447 
water facilitates the congelation of the acid, as is the case with 
chlorine. 
As to the temperature of this congelation, it was determined by 
using a spirit thermometer graduated to 187° below zero, to which 
about 44° must be added for the tube of the thermometer which could 
not be cooled, so that the cold observed was not less than 231°. 
These experiments were verified by commissioners, among whom 
were MM. Thenard and Dulong.—Journal de Chim. Med., tome ii. 
p.3. 
_ ARSENOVINIC ACID. 
M. Felix D’Arcet has found that when arsenic acid is made to act 
upon alcohol, a new acid, analogous to the sulphovinic and phospho- 
vinic‘acids, is formed. 
Arsenovinate of barytes is composed of 
Barium........ 27°20 
Carbon........ 19°21 
; Hydrogen...... 3°33 
ATSEHIG 3)... 20... 15:31 
Oxzyeenye ss ....d- 34:95— 100° 
Arsenovinic acid is stated to be formed of 
Calculated. Experiment. 
cs Dees Oe ak 24°93 
PAPO R, So eter Oe 4°47 
PP ioe a4 38°91 
O7 ........ 29°4—100° 31°69—100- 
Journ. de Chim. Med., tome ii. p. 11. 
METEOROLOGICAL OBSERVATIONS FOR MARCH 1836. 
Chiswick.—March 1. Cloudy: stormy. 2. Fine. 3. Showery. 4. Rain: 
windy at night. 5.Fine. 6. Rain. 7.Cloudy. 8.Rain.  9.Frosty: 
fine. 10. Hazy: drizzly. 11. Fine. 12. Stormy and wet. 13. Fine. 
14. Stormy and wet. 15.Rain: stormy. 16.Very fine. 17. Cloudy and 
windy. 18,19.Hazy: fine. 20. Veryfine. 21.Slight haze. 22. Drizzly. 
23, Hazy: slight rain: windy at night. 24. Fine. 25. Heavy rain: stormy 
showers. 26. Cold and windy: slight showers. 27. Frosty : fine. 
28. Stormy and wet. 29. Clear and cold: rain. 30. Heavy rain. 
$1. Stormy showers : clear arid windy. 
Boston.—March 1. Cloudy: rain early a.M.: rainp.M. 2. Fine: rain p.m, 
$. Cloudy. 4.Foggy. 5.Fine: rain early a.m.:rainr.m. 6. Cloudy, 
7. Fine. 8. Cloudy: rain early a.m. 9. Fine; rain early a.m. 10. Cloudy, 
11, Cloudy: rain p.m. 12. Fine and stormy: raine.M. 13. Fine: rain p.m, 
14, Stormy: rain early a.m. 15. Cloudy: rain early a.m.: rain A.M. 
16. Fine. 17. Stormy : rain early a.m. 18, 19. Cloudy. 20. Fine. 
21.Cloudy. 22.Fine: rainp.m. 23.Cloudy. 24. Fine: hail-storm p.m, 
25.Rain. 26, Fine and stormy. 27.Fine. 28. Rain. 29. Stormy. 
30.Cloudy: rain a.m. 91. Stormy: heavy squall with rain and snow a.M. 
* See note in the preceding page. 
